44results about How to "Guaranteed coaxial accuracy" patented technology

The invention discloses a computer-aided installation and adjustment method of a coaxial optical system. The computer-aided installation and adjustment method comprises the following steps of S1, establishing an optical model of an optical system to be installed and adjusted, and separately establishing n optical sub-systems along the optical path direction, wherein the n optical sub-system comprises optical elements 1-n; S2, selecting the image plane positions of each optical sub-system and obtaining an ideal wavefront aberration through simulation analysis; S3, introducing a position deviation amount to the optical element n in the n optical sub-system to obtain a simulated wavefront aberration; S4, solving a sensitivity matrix corresponding to each optical sub-system by adoptinga sensitivity matrix formula; and S5, solving the actual position deviation of the optical element n in the n optical sub-system by utilizing the sensitivity matrix and the actual wavefront aberration, and adjusting the optical element, so as to successively complete the installation and adjustment of the n optical sub-systems. By adoption of the method, the problem of mutual compensation ofpositions of all the optical elements in the adjusting process can be avoided, so that the convergence speed in the assembling and adjusting process is accelerated, and the assembling and adjusting precision and the assembling and adjusting efficiency are improved.

The invention relates to a structure of a high-efficiency axial flow and screw combined pump. A large flow and a high pressure are obtained by high speed rotation. A transmission chain in a ship is greatly simplified. The high-efficiency axial flow and screw combined pump has light weight and is suitable for high-speed sailing. The high-efficiency axial flow and screw combined pump is characterized in that an axial flow pump impeller and a screw of a screw pump which are driven coaxially are arranged in a big sleeve to form a structure of an axial flow pump and the screw pump; if the positions of the axial flow pump and the screw pump are exchanged, a structure of the screw pump and the multi-stage axial pump is formed; and water is sucked from the front of the ship bottom, obtains kinetic energy through the front-mounted pump and then is fed to the rear-mounted pump to be boosted to be sprayed, so that the ship is propelled. One single screw is arranged and is provided with a plurality of heads; screw edges are very narrow and have large screw pitch, so that the depth of a screw thread gradually becomes shallow to achieve the effects of large flow and high pressure; and the axial flow pump is designed by combining excellent aerofoils according to a variable-circulation variable-axis surface. The pump has a very simple structure, has good manufacturability and is easy to manufacture; the high-efficiency axial flow and screw combined pump is convenient to install; the high-efficiency axial flow and screw combined pump rotates at the high speed, has small volume and light weight, is efficient and energy-saving; the high-efficiency axial flow and screw combined pump has the self-adsorption capability and the ship has high sailing speed; the high-efficiency axial flow and screw combined pump can be made to have large power; the high-efficiency axial flow and screw combined pump has double-injection capability, a steering engine is saved and the high-efficiency axial flow and screw combined pump has high performances which cannot be realized by a single low speed axial flow pump or mixed-flow pump injection propeller.

The invention discloses a processing process of an axle shaft sleeve. The processing process is characterized by comprising the following steps that 1, precision forging of the axle shaft sleeve is carried out, wherein precision forging of the axle shaft sleeve comprises extrusion forming and finishing forging of the axle shaft sleeve, and extrusion forming of the axle shaft sleeve comprises a sorting procedure, a first extrusion forming procedure, a second extrusion forming procedure, a third extrusion forming procedure and a fourth extrusion forming procedure; 2, the axle shaft sleeve is installed and welded; 3, finishing turning is carried out on the axle shaft sleeve. Compared with an original process, the weight of an axle shaft sleeve forge piece is reduced, the weight of one axle shaft sleeve forge piece of a light truck series is reduced by about two kilograms, and the weight of one axle shaft sleeve forge piece of a heavy truck series is reduced by about three kilograms; the time spent in processing the one axle shaft sleeve is shortened by about 0.5 hour; the coaxiality and consistency of the central line of an axle housing and axes of inner holes of axle shaft sleeves at the two ends of the axle housing are better.

The present invention is one kind of drag for small service elevator, and belongs to the field of elevator driver. The drag for small service elevator includes motor, shaft coupling, speed reducer, brake disc, dragging wheel, jig, pedestal and brake, and features the output shaft of motor with flange, the drag seat of the speed reducer, and the flange seat for the motor to be fixed on through the flange seat. The drag for small service elevator of the present invention has the advantages of simple installation, correct location, high coaxiality between the output shaft of the motor and the worm shaft of the speed reducer, high braking stability and effect, etc.

The invention relates to an assembly method of a transmission shaft structure, and a screw tailstock is movably assembled and is self-aligned. A traditional screw tailstock is assembled in a mode that the center height of the screw tailstock is adjusted by adopting an adjusting pad and is fastened radially by using a bolt. Measurement and match grinding are needed, therefore, the skill requirement of assembly personnel is high, and the measurement and match grinding errors exist. According to the assembly method, by utilizing the characteristic that the position of a screw is limited by a screw nut when the screw nut moves to the tail end of the screw, the self alignment of the screw tailstock which is installed on the tail end of the screw is guaranteed, and the screw tailstock is axially fixed at the moment, so that the coaxial precision of the assembly position of the screw tailstock and the screw is guaranteed.

The invention provides a permanent magnet type quadrupole magnet and an assembling method thereof. The permanent magnet type quadrupole magnet comprises a metal skeleton with a containing cavity, a plurality of magnetic blocks and a plurality of jackscrews, wherein the magnetic blocks and the jackscrews are located in the containing cavity and arranged in a Halbach array mode. The top of each magnetic block is fixed to the inner side of the metal skeleton through the plurality of jackscrews and extrudes towards the center of the metal skeleton, so the side faces of every two adjacent magneticblocks are tightly attached, and the bottoms of the magnetic blocks are sequentially connected end to end to form a circular cavity. The invention further discloses an arrangement mode of the magneticblocks in the metal skeleton so as to improve the rate of finished products. When the permanent magnet type quadrupole magnet is assembled, an auxiliary tool is used, the auxiliary tool is taken outafter the magnetic blocks are fixed in place, then magnetic center measurement is carried out, and mechanical treatment is carried out on the outer circle of the quadrupole magnet skeleton according to the measurement result until the eccentricity of the magnetic center meets the design requirement.

The invention discloses a self-centering bidirectional rotating cross shaft machining main shaft in the technical field of precision machining equipment. The self-centering bidirectional rotating cross shaft machining main shaft comprises a device shell, a rotating oil cylinder mechanism, a lifting mechanism, clamping reversing mechanisms, positioning mechanisms and a speed reducing motor, whereina bearing fixing sleeve and a pair of angular contact bearings are fixedly attached to an inner cavity of the device shell; the lifting mechanism is arranged in an inner cavity of the rotating oil cylinder mechanism; the lifting mechanism comprises a lifting frame body and two lifting installation blocks; the clamping reversing mechanisms is provided with two groups symmetrical at up and down; the two groups of clamping reversing mechanisms clamp and fix a cross shaft workpiece by mutually approaching; the positioning mechanism is provided with two groups which symmetrical at back and forth and are respectively embedded on the front side and the back side of the lifting frame body and used for positioning two opposite shaft ends in the cross shaft workpiece; and the speed reducing motor is embedded below the device shell and used for driving the rotating oil cylinder mechanism to rotate. The self-centering bidirectional rotating cross shaft machining main shaft is used for machining the cross shaft workpiece.

The invention relates to a flange pipe fork forging forming process and a flange pipe fork formed by using the same. The flange pipe fork forging forming process comprises the following steps of 1, blanking; 2, heating; 3, forging forming; 4, middle hole punching and edge cutting; 5, air cooling; 6, shot blasting; 7, end face turning and mounting hole drilling; 8, fork arm side hole forming; and 9, rust-proof treatment. The flange pipe fork forging forming process has the effect that the flange pipe fork with high coaxial precision can be formed.

The invention discloses a machining method for a graphite blade pump rotor and further discloses a first special clamp and a second special clamp which are used in the machining method. The machiningmethod comprises the following steps of (1) end face milling; (2) positioning hole drilling; (3) roughening; (4) assembly hole drilling; (5) rotary vane groove rough milling; (6) connecting plate positioning face finish milling; (7) first outer circle finish milling; (8) finish drilling; (9) secondary roughening; (10) second outer circle finish milling; (11) rotary vane groove finish milling; (12)breaking-milling; (13) outer circle grinding; and (14) plane grinding. According to the machining method, the coaxiality of the rotor and damage avoidance of the edges and corners of a rotary vane groove in the rotor can be ensured, and the machining accuracy and efficiency are improved. An air groove is formed in the first special clamp so that a workpiece can be tightly sucked, it is ensured that the workpiece cannot move in the machining process accordingly, and thus the machining accuracy of the workpiece is ensured; and an air draft hole is formed in the second special clamp so that therotor can be tightly sucked and fixed, and the machining accuracy of the rotor is improved.

The invention relates to a cooling wheel testing device. The cooling wheel testing device comprises a support, a frequency converter, a motor, couplers, bearings, a stepped shaft, a torque meter and wheels, wherein the frequency converter is fixedly mounted below the support; the motor and the torque meter are horizontally opposite to each other, fixedly mounted at the left end and the right end of the support respectively and located in the same axis; the stepped shaft is supported by the two bearings mounted on the support, the two ends of the stepped shaft are connected with an output shaft of the motor and an input shaft of the torque meter through the couplers respectively, and a cooling wheel is mounted on the small-diameter shaft section of the stepped shaft for testing; the wheels are fixedly mounted at the lower ends of the four corners of the support respectively, the support can be moved through the wheels, and meanwhile a locking structure is arranged on each wheel; a base of the support can be stretched to adapt to stepped shafts with different lengths. The cooling wheel testing device is reasonable in structural design, low in manufacturing cost and good in detection effect.

The invention provides a grinding device which comprises a grinding shell, a discharging opening is formed in one side of the grinding shell. a first grinding element and a second grinding element are coaxially arranged in the grinding shell, a grinding gap is formed between the first grinding element and the second grinding element, and the second grinding element rotates relative to the first grinding element so as to grind the raw materials to be ground in the grinding gap; a propelling wheel is connected to the lower portion of the second grinding element so as to drive the second grinding element to rotate, and the rotation of the propelling wheel can push the ground raw materials from the grinding gap to the discharging opening; a driving assembly is arranged below the grinding shell, and the driving assembly is connected with the propelling wheel in a torque transmission manner; the propelling wheel and the driving assembly comprise a torque connecting part, the grinding shell is provided with a through hole for the torque connecting part to penetrate through, the torque connecting part is radially supported on the grinding shell through a fixed supporting piece, a rolling supporting piece is arranged between the propelling wheel and the grinding shell, and the rolling supporting piece provides at least axial support for the propelling wheel.

The invention relates to a butt welding tool for airport transportation rollers, which is characterized in that it includes a base, a steel pipe support device and a shaft head clamping device; the steel pipe support device includes a bottom plate, a screw, a hand wheel and two C-shaped seats , the bottom plate is fixed on the base through fasteners, two C-shaped seats are installed on the bottom plate through horizontal slideways, the screw is fitted on the two C-shaped seats through threads, and the hand wheel is installed on the screw; the shaft head is clamped The device includes a base, the base is installed on the base through fasteners, the upper end of the base is connected to the upper cover through a pin shaft, the upper cover is equipped with locking bolts, and the lower part of the upper cover and the upper part of the base are provided with V-shaped grooves mouth. The invention can ensure the coaxial precision of the steel pipe body and the shaft head, solve the problem that it is difficult to meet the coaxiality requirements and low production efficiency only by manual marking and alignment, and finally realize the high-quality and high-efficiency production of airport transport rollers .